While playing the game, hold L1 + L2 + R1 + R2 + Start + Select to return to the main menu.

Duplicate weapons (Final Fantasy 4)

Get into a battle, then have the character who has the weapon to be duplicated select the "Item" command. Select a black space in the item list, then select the weapon to be duplicated. Exit the item list and have your character run away. Then, go to the menu screen and equip the weapon you chose to be duplicated. It should say that you have two of that weapon. Unequip and equip the weapon once more to add an extra weapon to the item list.

Secret Developer's Room (Final Fantasy 4)

The "Secret Developer's Room" is hidden in the Dwarf Castle in the Underworld. Between the weapon and armor shop is an odd section of wall that is actually a doorway to the "Rally-Ho" pub. On the right side of the pub is a fake wall. Walk through this wall and you will reach a staircase which leads to the Secret Programmer's Room.

Skip Sealed Cave event (Final Fantasy 4)

When you go to the Underworld and go to the Dwarf Kingdom, after you have to fight the dolls in the secret crystal chamber, Rydia returns and helps you fight. After you are done and back in the main chamber, use her warp spell to get back to the crystal room. The crystal will still be there. Approach and examine the crystal to take it. Later when you have to go to the Sealed Cave, if you have the Crystal, you will not have to enter it. You can skip that event and the game will automatically go to the sequence that normally happens as you are coming out.

Defeating Asura (Final Fantasy 4)

Cast Wall on Asura, and she will not be able to use her cure spells on herself, and they will be cast on your characters. Make sure your party is at least level 35 or higher. Attack her with Rydia's best spells and use your best sword with Cecil. Use the Fire Saber because it damages her the most. Note: The Fire Saber is obtained from the Tower of Bable immediately after getting the Earth Crystal. The spell you want to use with Rydia is Virus. It does at least 700 if your characters are up to level. Also, if you have Kain, make him jump because he usually has the most HP -- he does not have to be cured from the reflected cure spells from Ausara. Note: The less people in your group when they get cured, the more HP that they will get back. In other words, Kain needs to be in the air at all times.

Defeating Golbez (Final Fantasy 4)

When fighting Golbez in the underworld after defeating Calbrena, make sure Kain is up in the air before Golbez summons his dragon. If you do not, he will kill all of your characters before Rydia appears. You should have Cecil, Rydia, and if your lucky and your timing is correct, Kain. Note: Kain will really help in this battle; make him jump, have Cecil use his sword, and Rydia use Virus.

Defeating Milon Z. (Final Fantasy 4)

To kill Milon Z. easily, cast some Cure 4 spells on him, or give him some Elixirs.

Defeating the 4 Fiends (Final Fantasy 4)

To defeat the 4 Fiends easily, use their weaknesses. For Milion, keep using Fire spells and attack. When he dies, he will return as Milion Z. Use Fire, Cure, and attacks to defeat him easily. For Cagnazzo, use about two Bolt 3s and he should die, depending on your level. For Valvalis, have Kain jump and make her come out of her tornado form. Keep attacking her from there. For Rubicant, use Ice 3 only when his cape is open or else it will cure him. Have Edge throw swords, have Kain jump, and the rest attack. Note this strategy also works when you have to fight the 4 Fiends again when in the Giant, only Rubicant never closes his cape.

Ending 1: Beyond Time (Chrono Trigger)

To trigger this ending, go to 1999 AD (Epoch, Bucket, or Black Omen) after returning Chrono to life or after finishing all the side quests. This unlocks All Movies except #3; Endings. Variations:

If you killed Magus in your second meeting, Frog will be Glenn again.

If you didn't enter the code in to the machine at Lucca's House to save her mother, she will be sitting instead of standing.

In the Castle throne room 1000 AD, if you freed the Chancellor after beating the second Yakra, he will be there. If not, your lawyer Pierre will.

If you went to 1999 AD by way of the Epoch, Crono & Marle will fly off with balloons. If not, your cat(s) will disappear through the time gate.

Ending 2: Reunion (Chrono Trigger)

To trigger this ending, go to 1999 AD (Epoch, Bucket, or Black Omen) after getting the Epoch for the second time or after finishing all the side quests. For this ending, Crono must be dead. This unlocks All Movies; Monster Data - Present; Art Gallery. Variations:

If you killed Magus in your second meeting, Frog will be Glenn again.

If you did not enter the code in to the machine at Lucca's House to save her mother, she will be sitting instead of standing.

If you went to 1999 AD by way of the Epoch, Marle will fly off with balloons. If not, your cat(s) will disappear through the time gate.

Ending 3: Dream Project (Chrono Trigger)

To trigger this ending, in a New Game+, examine the shining dot on the right pod of Lucca's device at the square immediately after you get Marle in the start of the game to fight Lavos. Only Chrono and Marle can be used. Alternately, defeat Lavos the first time you encounter him in the Ocean Palace, preventing the death of Crono. This unlocks: Movie #3; Monster Data - Middle Ages; Tech Showcase - Triple.

Ending 4: Successor Of Guardia (Chrono Trigger)

To trigger this ending, in a New Game+, after defeating Yakra in the cathedral, and returning to Lenee's Square in 1000AD, examine the shining dot on the right pod of Lucca's device. Only Chrono and Marle can be used. This unlocks: Movie #3; Monster Data - Future; Tech Showcase - Single.

To trigger this ending, in a New Game+, after defeating Heckran, examine the shining dot on the right pod of Lucca's device. This unlocks: Movie #3; Music Box - Tracks 12-20; Treasure Map - Dark Ages (After The Fall and Blackbird) and End Of Time.

Ending 6: Legendary Hero (Chrono Trigger)

To trigger this ending, in a New Game+, when you arrive in 600 AD for the second time, go back to the end of time and examine the bucket. This unlocks: Music Box 21-30; Monster Data - Dark Ages.

Ending 7: The Unknown Past (Chrono Trigger)

To trigger this ending, in a New Game+, use the bucket at the End Of Time immediately after you receive the Hero Medal from Tata. This unlocks: Music Box 31-40; Treasure Map - Present.

Ending 8: People Of The Times (Chrono Trigger)

To trigger this ending, in a New Game+, use the bucket at the End Of Time immediately after you receive the stolen gate key for Azala in 65,000,000 BC. This unlocks: Music Box 41-50; Treasure Map - Middle Ages.

Ending 9: The Oath (Chrono Trigger)

To trigger this ending, in a New Game+, after taking Frog to break open the Magic Cave, return to the End Of Time and use the bucket. This unlocks: Music Box 51-60; Monster Data - Middle Ages.

Ending 10: Dino Age (Chrono Trigger)

To trigger this ending, in a New Game+, after defeating Magus at his fortress, go to the Mystic Mountains, return to the End Of Time and use the bucket. This unlocks: Monster Data - Prehistoric; Treasure Map - Future.

Ending 11: What The Prophet Seeks... (Chrono Trigger)

To trigger this ending, in a New Game+, after defeating Azala and Black Tyrano, go through the gate to 12,000 BC. Use the gate to return to the End Of Time, and use the bucket. Alternately, go to 1999 AD immediately after you get the Epoch for the first time. This unlocks: Tech Showcase - Dual; Treasure Map - Dark Ages (Terra Continent and Zeal Realm).

Ending 12: A Slide Show (Chrono Trigger)

To trigger this ending, in a New Game+, immediately after Schala opens the sealed door to the throne room of Zeal Palace after speaking with Janus, immediately make your way back to the gate. Do not use the Mammon Machine. Return to the End Of Time and use the bucket. This unlocks Music Box 61-96; Boss Data.